A device and method for sheet metal multi-point punch liquid-filled deep drawing

Abstract

The invention discloses a multi-point male die liquid-filling drawing forming device and a multi-point male die liquid-filling drawing forming method for a plate, relates to a device and a method for forming thin-walled curved plate parts, and aims to solve the problem of difficulty in forming of thin-walled and deep-cavity parts with complicated curved surfaces. A plurality of small punches are independently arranged; the upper ends of the small punches penetrate into through holes in a male die body; the upper end of each small punch is connected with a linear driving device; a female die is a semi-closed cavity of which the upper end is opened and the lower end is closed; an elastic base plate and a metal protection plate are superposed on the upper end surface of the female die from bottom to top. The heights of the small punches are adjusted to realize the construction of an outer contour of a multi-point male die; a to-be-formed plate blank, the elastic base plate and the metal protection plate are sequentially arranged on the upper end surface of the female die; a blank holder moves down to be assembled with the female die, and the multi-point male die moves down and applies a drawing force to the to-be-formed plate blank; meanwhile, a liquid medium is filled into an inner cavity of the female by the aid of a pressurizing system until drawing is completed to obtain parts of a required shape. The device and the method are used for forming the plate, and the thin-walled and deep-cavity parts with the complicated curved surfaces can be formed.

Description

technical field [0001] The invention relates to a deep-drawing forming device and method for a plate, in particular to a forming device and method for a plate part with complex curved surface, thin wall and deep cavity. Background technique [0002] With the development of aerospace, aviation and automobile industries, traditional plate parts are moving towards complex curved surfaces (space free-form surfaces) and thin walls (the relative thickness of the slab t / D<0.5%, where t represents the thickness of the slab, and D represents the diameter of the slab) , deep cavity (relative height h / d>1 of the part, where h represents the height of the part, d represents the opening diameter of the part) and other trends, which put forward higher requirements for the forming technology. Traditional manufacturing technology has problems such as high mold cost, many forming passes, long manufacturing cycle, and poor formability, which cannot meet the needs of the development of s...

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to combine the technical advantages of multi-point forming and liquid-filled deep-drawing forming to provide a multi-point punch liquid-filled deep-drawing forming device and method to solve the forming difficulties of parts with complex curved surfaces, thin walls and deep cavities problems, especially the difficulty in forming parts with complex shapes and the uneven distribution of wall thickness of slabs formed at one time

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